What does "dreadful" mean in this quote?
"'What are the Kalidahs?' asked the girl.
'They are monstrous beasts with bodies like bears and heads like tigers,' replied the Lion, 'and with claws so long and sharp that they could tear me in two as easily as I could kill Toto. I'm terribly afraid of the Kalidahs.'
'I'm not surprised that you are,' returned Dorothy. 'They must be dreadful beasts.' "